1{
2  for (int c1 = 0; c1 <= 7; c1 += 1)
3    s0(1, c1);
4  for (int c0 = 2; c0 <= 6; c0 += 1) {
5    for (int c1 = 0; c1 < c0 - 1; c1 += 1)
6      s1(c0, c1);
7    for (int c1 = c0 - 1; c1 <= 4; c1 += 1) {
8      s1(c0, c1);
9      s0(c0, c1);
10    }
11    for (int c1 = 5; c1 <= 7; c1 += 1)
12      s0(c0, c1);
13  }
14  for (int c0 = 7; c0 <= 8; c0 += 1)
15    for (int c1 = c0 - 1; c1 <= 7; c1 += 1)
16      s0(c0, c1);
17}
18